chemical engineering chemical process Mcqs
251. Styrene-butadiene-rubber (SBR) as compared to natural rubber has________________?
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A. Poorer resistance to oxidation

B. Greater amount of heat build-up under heavy loading

C. All A , B. and C.

D. Poorer tensile strength

254. Nylon-6 is manufactured from ______________________ ?
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A. Caprolactam

B. Hexamethylene diamine and Maleic anhydride

C. Hexamethylene diamine and Sebacic acid

D. Hexamethylene diamine and adipic acid

256. Neoprene is chemically known as___________________?
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A. Styrene butadiene rubber (SBR)

B. Polychlorophrene

C. Polybutadiene

D. Polyurethane

257. Styrene is produced from ethyl benzene by the process of________________?
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A. Oxidation

B. Alkylation

C. Dehydrogenation

D. Dehydration

258. Kaolin is a/an _____________________?
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A. Synthetic resin

B. Artificial abrasive

C. Blue pigment

D. Refractory material
259. Phosphate rock is a raw material for the manufacture of____________________?
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A. Phosphorous

B. All A , B. and C

C. Superphosphates

D. Phosphoric acid

260. ____________________ is a thermosetting plastic ?
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A. Polythene

B. Epoxy polymer

C. P.V.C.

D. Polystyrene

261. Varnish does not contain_______________?
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A. Thinner

B. Pigment

C. Both A. & B.

D. Neither A. nor B.

262. Permanent hardness of water can be removed by_________________?
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A. Treating it with zeolites

B. Passing it through sodium hexametaphosphate

C. All A , B, and C.

D. Addition of soda ash to it

263. Which of the following is an yellow pigment ?
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A. Titanium dioxide

B. Zinc sulphides

C. Lead chromates

D. Ferrous sulphate

264. Lubricating greases are a mixture of__________________?
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A. Fatty oil and metallic soap

B. Mineral oil and metallic soap

C. Mineral oil and fatty oil

D. Mineral oil, soap and additives
267. Enzymes are organic catalysts used in the ____________________ reactions ?
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A. Biochemical

B. Photochemical

C. Chemical

D. Electrochemical

269. In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?
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A. 1 atm., 800C

B. 1 atm., 170 180C

C. 10 atm., 170-180C

D. 10 atm., 800 C

277. Dacron is a ___________________?
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A. Condensation product of Hexamethylene diamine and adipic acid

B. Condensation product of dimethyl terephthalate and ethylene glycol

C. Thermosetting material

D. None of these
278. Synthesis gas is a mixture of__________________?
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A. N2 and H2

B. CO2 and H2

C. H2, CH4 and CO

D. CO and H2
281. High purity nitrogen is used in__________________?
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A. Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils

B. Fire fighting purposes

C. Both A. & B.

D. Neither A. nor (B)

283. Poly Vinyl Chloride (P.V.C.) is a ______________ material ?
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A. Thermosetting

B. Fibrous

C. Thermoplastic

D. Chemically active

285. Which is the most suitable dye for synthetic fibres ?
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A. Mordant dye

B. Azoic dye

C. Acid dye

D. Pigment dye

286. Producer gas consists mainly of________________________?
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A. H2, CH4

B. C2H2, CO2, H2

C. CO, CO2 N2, H2

D. CO, H2

288. Which of the following paper does not require a filler during manufacture ?
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A. Bond paper

B. Writing paper

C. Blotting paper

D. Coloured paper

289. Sulphur addition in soap is done to _____________________?
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A. Cure pimples & dandruff

B. Fasten lather formation

C. Improve the soap texture

D. Increase its cleansing action

293. Phthalic anhydride is used____________________?
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A. In making PVC

B. As plasticisers

C. For making nylon-6

D. In insecticides manufacture

294. A mineral is termed as ore, if ____________________?
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A. A metal can be economically extracted from it

B. The metal present in it is costly

C. It contains ? 40% metal

D. All A , B. and C.

295. Which of the following is not an insecticide ?
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A. Nicotine

B. Sodium fluoride

C. Hexane

D. Hydrocyanic acid

297. Which of the following fuel gases contains maximum amount of carbon monoxide ?
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A. Water gas

B. Coke oven gas

C. Blast furnace gas

D. L.D. converter gas
300. Main constituents of natural rubber is____________________?
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A. Polystyrene

B. Polyisoprene

C. Polychlorophrene

D. Polybutadiene